Valve



Sept 20, 1932- G. E. HAZARD VALVE Filed Feb. 1. 1928 taken on `the line `2- 2 Patented 2Q, 1932 STATES, PATENT *OFFICE Geenen-EDGAR HAZARD, oF ROCHESTERQNEW YORK, assicuro?. rro KnLLoee MANU- f rAoTgRrNe COMPANY, ornocHnsrEza, NEW Yom:

l vAIQvE to and `from* Thepresent airy valveis primarily intended for `use:with thefairgxQoperated .tire changer v which is" illustrated anddescribed in mypendf ing apphcation bearingSerialNumber 2.30 912 whereinl thereis va pistonadapted'to op erate the arms "which the vehicle wheel mountin and demountingthetiretlierefrom. In the tire `changer "air .is delivered-togthe drivingl the piston upwardly or. downward y to bring .y bout the expansion o'rrcontraction of the rimby the arms. f

The` primary object of the presentinv'en# tion is the provisionV of an air valvewhich is cheap `and simple of'` construction and is` far superiorto. thosel now in use' as'it is absolutely airtightand is muchmore rapid. lin operation and additionally is very serviced in case anyftrouble arises which calls for repairor adjustment. y f

4Another' and'furtherjobject ofthe inven-` tion.. isthev provision v'of a valve which is highly the piston .while purging the air. inder at the opposite side-:of the piston.

Other objectsfnovel features ofconstruvczrtion and improved 'results of vthe invention will appear from "the following description and accompanying drawing.

In the drawing: Figure 1 is vaview imf roved valve.` i

`the direction indicated by arrow.

Figure 3 is a vertical sectional view taken on the line 3-3 .of Figure'2 looking in the directionindicated by arrow. x

Reference being now had to the drawing which illustrates a preferred embodiment of the invention, it will be seen that thereis provided a main casing or: housing 5 upon one an air valve the'purpose' of. controlling J a piston mounted for well' Vxpand andicontract v y y v re Sor .(DOt Shown) o1-other V'suitable source... 1.'

i theconduitonlpipe 11 and "fis constantly present in.

` 1 ;The airchamber Q'might be well termed. .the

c'ylindertop air chamber` as-this. chamber.

in communication withthtoploff t the cylinder through they medium of/a pipe or 1 .1 constantly efficientin operation and whichyauf;

m .side elevation ofthe j upon its seatby a c 'oil spring 17, one end of *961,

of Figure 1 looking in Application filed February 1,;1928. Serialv No. 251,184.

side of which vis formed a bracket 6 having openings 7 for screw bolts or the like by means of whichvthe valvecan beeasily and quickly attached to amachine or any other suitable' support.

- vReferer'ice being had to Figure 2, it will be seen that there is provided three semi-circular air chambers 8, 9, and 10 which are cast or` formed integrally with the main valve heusmg orfca'stingv 5.V The airchamber 8 may be his'."chamberfreceivesf air. from a com- Vconduit 12.

terme'dthe' main air chamber inasmuch.

The. air chamber 10 might be .weuiefmed the cylinder bottom lairchamber as this chamber is constantly in communicationjwith the bottom of the cylinder' vbelow- 'the piston duit 13.

' A fourth conduit 14. is shown and is in coino. 'when desired, to a vehicle tire for the purpose Lof inflatingthe tire and a suitable valve (not .'shown) conduit 14: for controlling the vpassage of air should `be' provided somewhere in the therethrough.

Communlcation lbetween the main air ,chamberv and the cylinder top airchamber is gum 2 is a horzont'al Sectoal `iev-ij.which lengages the upperscup shaped .valve had throughv an opening 15 which opening 1s 1 i .normally close'dbyavalve 16 which is held.`

top 18 whileits opposite' .end'is retained with-.,k in the inwardly extending cage 19 of. the

screwl plug 20.

the opening 15 andl isheld firmly in. place 1V through yengagement with the lower end of the cage housing 19. It will be readily apparent that when the plug 2O is screwed A .valve seat 21 surrouds.

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The valve 16 is provided with an elongated stem 22 which extends downwardly through the opening 15 through the air chamber 9 outwardly through the inner Wall 23 ,of the air chamber 9. A suitable packing 24 is provided to prevent the escape of air around the stem.

Communication is provided between the air chamber 8, at itsopposite end with the air chamber 10 through a suitable openino` 25 which is normally closed by a valve 26 willich valve is of a similar construction to the valve 16 and there is present in respect to this valve a similar coil spring 17, screw plug 20, valve seat 21 and elongated valve stem 26 which passes outwardly through the inner wall 27 of the air chamber 10 through a suitable packing 24 as is the case in respect to the valve 16.

The air chambers 9 and 10 at their ends opposite to the inlet .openings l5 and 25 from the main air chamber 8 are provided with outlet openings 28 and 29 respectively to atmosphere. These outlet openings are in the inner walls of these two chambers and the inner ends of these openings are provided with surrounding valve seats 30 held in place by t-he cage portions 19 of the screw plugs 20.

The opening 28 is normally closed by a valve 31 while the opening 29 is normally closed by a valve 32. Both of these valves have mounted above them coil springs 33 of a similar construction to the previously described 32 coil spring 17 and which are similarly mounted.

The valve 31 is provided with an elongated stem 34 carrying a plunger 35 adapted for reciprocation in the opening 28 and normally extending beyond the inner e'nd thereof.l

The valve 32 is provided with an elongated stem 36 provided with a plunger 37 adapted for reciprocation in the opening 29 and normally extending beyond the inner end thereof. l

The valve housing -or casting 5 is provided with an upwardly extending collar or flange 38 in which is rotatably mounted a stub shaft 39 which extends above thev collar and to Which is suitably clamped through the niedium of a bolt 40 the inner end of the operating handle 41. The lower end of the stub shaft extends downwardly through the housing 5 through a short flange or collar 42 and adjacent its lower end Carries a cam 43 having two high spots 44 and 45. This cam is held in place upon the stub shaft by a bolt 46 and is rotatable with the stub shaft.

By reference to Figure 2 it will be seen that the entire valve housing 5 is approximately the shape of a horse shoe and that the stub-shaft 39 extends centrally downwardly i between the air chambers 9 and' 10 and that the cam 43 is Consequently so positioned that upon rotation of the cam it will engage the protruding ends of the valve stems 22 and 26 positioned to put the cam 43 in a neutral` position and that all of the valves are in closed position.

Let us assume that it is desired to deliver air to the top of the cylinder above the piston for the purpose of driving the piston downwardly.

The operating handle 41 is grasped and oscillated to cause the high spot 44 of the cam 43 to engage the lower end of the elongated stein 22 of the valve 16 and lift this valve from its seat. With the positioning of the cam to bring about the opening of the valve 16 the oppositely positioned high spot 45 of the cam has automatically engaged the plunger 37 and lifted the valve 32.

As air under pressure is constantly in the chamber 8 this air will pass downwardly through the opening l5 to the air chamber 9 and from there through the pipe 12 to the top of the cylinder above the piston while the cylinder below the piston is allowed to purge itself through the pipe or conduit 13 into the Chamber 10 and from this chamber to atmosphere through the opening 29, which is opened by reason of the lifting of the valve From the foregoing it will be readily apparent that a reversal of the direction of the piston is had by merely oscillating the operating handle 41 to cause the high spots of the cam to engage the valve stem 26 and valve plunger 35 to open the valves 26 and 3l respectively, thus allowing the delivery of high pressure to the cylinder below the piston and at the saine time permitting the cylinder above the piston to purge itself through the opening 28.

In the' meantime the val'ves 16 and 32 have automatically been closed by reason of the expansion of the coil springs 17 and 33.

When the operation of the tire changing tool or machine has been completed the vehicle tire can be inflated by air delivered from the air chamber 8 through the pipe 14 by the mere manipulation of any well known form of valve.

From the foregoing it will be seen that I have provided a valve. which is very rapid in its. operation and operates to simultaneously deliver air to a cylinder at one side of the piston and to purge the cylinder at the other side of the piston. I

By reasonV of the screw plugs 20 the construction is such that all of the valves can be quickly and easily gotten at for repair or adjustmentwhich is a highly desirable feature of construction.

e 'ing them,

It will further seen Kthat the construction is such that the possibility of leakage isremote. L f

Having thus described my invention what claim and desire to secure by Letters Patent is: l

1. A valve comprising a housing having a main air chamber of an arcuate shape'and two vsupplemental air chambers of a similar configuration in communication therewith, said chambers forming a housing of a shape approximate to a horseshoe the communication between the supplemental chambers and the :nain chamber being positioned at one end of said supplemental chambers and at opposite ends of the main chamber and being normally closed by valves, escape openings in the oppolsite ends of eachof said supplemental cham bers and being normally closed by valves all of said 4valves having stems extending into said horseshoe-shaped housing, outlet de- 'livery pipes constantly in communication with said supplemental chambers intermediate their ends, and means comprising a single cam to simultaneously open Ithe escape valve of one supplemental chamber and the inlet valve of the otherv supplemental v chamber or to' simultaneously open the inlet lvalve of the first-named supplemental cham ber and the escape valves of the last-named supplemental chamber, for the purposede-y,

scribed.

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munication between vsaid supplemental chambers and saidmain chamber, .valves incr-f mally closing .said inlet openings and provided with elongated stems extending chambers provided withv valves normally clossaid valvesy having elongated stems extending throughy beyond lthe inner walls of said supplemental chambers through -said escape openings, f outlet .delivery -pipes for.l

said supplemental chambers constantly 4in communication therewith, a single 'cam having` oppositely ypositioned high spots rotatably mounted v between v said supplemental chambers, and means to oscillate said cam to cause said high spots to engage and operate vth'este'm oiA the escape valve of onesupplemental chamberv and the stem of .the inlet valve of the other supplemental chamber, or to enga e and operate the stem of the inlet vvalve o the rst-mentioned supplemental chamber and the stem of the exhaust valve of the -second named supplemental chamber; said single cam thereby operating four valves for the purpose described. v

3. A valve of the character described comprising. a housing having a single main air, chamber and two supplemental air chambers offene supplemental chamber and the inlet valve comprising a housing having af; v main vair chamber .and twov supplementalv air I35 chambers, `inlet openings providing e comtheLmain-air--chamber-s, outlet-delivery pipes' v Constantly 'ncommunication with said supopenings to atmosphere and valves'normally *closing said openings, said inlet and. escape valvesl -provided -with lelongated stems exthrough. the'inner 4walls oif's aidsii'pplemental4 chambers andbeyond the same,escape open-f ings in the inner lwalls ofsaid supplementalvvv cam having oppositely positioned high spots in communication therewith, valves normallyV closinggf the communication between said. v chambers, each ofsaid supplemental air chambers provided with Aoutlet delivery pipes and escape openings, valves normally closing said escape openings, said inlet and escape openings providedwith seats cooperating with their respective valves, screw plugs in the main air chamber above the inlet valves v and screw plugs in the supplemental chambers above said escape valves, said screw plugs provided with elongatedcages engaging and-holding their respective valve seats in place, coil springs mounted between the tops of said valves and the inner faces of said screw plugs, all of said valves provided with elongated stems extending inwardly through and beyond the inner walls of said supplemental chambers, a single cam having oppositely positioned high` spots rotatably mounted intermediate said supplemental chambers and the inwardly extending ends of the said valve stems, and means to rotate said cam to cause the openings oi the escape valve the purpose described.

4.. V4Avv-.valve comprising a housing of a shape approximately similar toa horse shoe made upoafmain air chamber 'of an arcuate shape andf'ftwo supplementa ,-air chambers of a valveot'theiother supplemental chamber, for,

1similariceniguljation in communication there- .y .with,*valves normally `closing inlet openlngs y' between the'supplemental'airfchambers and .plemental.air'chambera each of said supple- I mentaliair4 chambers provided with escapel tending-inwardly through andbeyond the inner walls of saidsupplemental lchambers` into-'said horseshoe-shaped housing, a single .rotatably mounted centrallyvv of saidl horse .v shoe shaped housing and between the extendy' ing valves ends, and means to, rotate said cal-m` vforthe purpose of simultaneously admittingl air to-one supplemental chamber and' purgmental air chambers of a similar configura. tion in communication therewith-"said chambers forming a housing of a shape approxi'- y mate to a horse shoe, valvesnormallyclosing v the communication between said chambers,f each of said supplemental chambers provide with an outletjdelivery pipefand an'escape opening, valves normally closing said escape openings, all of said valves having elongated stems extending inwardly through the inner walls of said supplemental chambers and into 130 so. e

et'v

iiof l 1'115 f ing air 'from the other supplementalfcham-S ber, for the purpose described.' f 5. A valve comprising asingle main air chamber of an arcuate shape and two supplelzo pose described.

said housing, a, single cam rotatably mounted and centrally disposed Within said housing vfor* operative engagement with the ends of all of said valves, and'said cam having oppqsitely positioned high spots to cause upon rotation said high spots to engage the 4stem of one escape valve of one supplemental chamber and the stem of the inlet valve of the other supplemental chamber for the pur- In testimony whereof I hereunto J'l r signa-ture.

GEORGE EDGAR HAZARD.

newness 

